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The 428 Super Cobra Jet (also known as the 428SCJ) used the same top end, pistons, cylinder heads, camshaft, valve train, induction system, exhaust manifolds, and engine block as the 428 Cobra Jet. However, the crankshaft and connecting rods were strengthened and associated balancing altered for drag racing.
The HiPo engine was used in modified form by Carroll Shelby for the 1965–1967 Shelby GT350, receiving special exhaust headers, an aluminum intake manifold, and a larger 4-barrel Holley 715 CFM carburetor, which raised rated power to 306 bhp (310 PS; 228 kW) at 6,000 rpm and 329 lb⋅ft (446 N⋅m) at 4,200 rpm of torque.
The Boss 429 engine came standard with a 735 CFM Holley 4-barrel carburetor mounted on an aluminum intake manifold that flowed well for its time. [1] 1969 cars featured hydraulic lifters, switched to solid lifters in 1970 models to minimize valve float at high RPMs; the dual exhaust system was improved, but rated power stayed the same.
The GT500 was added to the lineup, equipped with a 428 cu in (7.0 L) Interceptor V8 engine with two 600 CFM Holley four-barrel carburetors mated to a mid-rise aluminum intake manifold. Documented plans to introduce a convertible mid-production year were shelved due to supply, production and financial problems that happened as soon as the first ...
The 428-4V Cobra-Jet was the most potent engine available for 1968, and is general believed to be under-rated at 335 hp (250 kW). [5] The cars equipped with the 428 Cobra Jets had emblems borrowed from the full-sized Fords (a red-and-chrome badge reading "428") mounted on the fenders behind the parking lamps.
The Ford Mustang Mach 1 is a combination performance and appearance package offered as an option for the Ford Mustang in August 1968 for the 1969 model year.. Over the following years, the package was available with various engines that became more modest as emissions controls, unleaded gas, fleet mileage quotas, and higher gasoline prices undercut the "horsepower wars" that were the origin of ...